Plant and Flower Calculator
Estimate Plants or Flowers for Landscaping
Estimate the number of plants or flowers needed to fill a landscape bed by entering the size of the bed and the desired plant spacing. The calculator will estimate the number of plants needed for both rectangle and triangle planting patterns.
How Many Plants or Flowers Are Needed For Different Planting Patterns and Grids
To find how many plants or flowers you need you first need to identify the pattern you would like to place them in and also the spacing between each plant. Plants may be put in a rectangular or a triangular grid and estimating the plants needed for each patterns is a bit different. Check out our soil calculator to estimate soil for your plantings and our mulch calculator to find how much mulch you need for your landscaping.
Rectangular Planting Grid
Planting flowers in a rectangular pattern involves placing each plant in parallel rows and columns. Divide the landscape bed into squares that are the width and length of the desired plant spacing and add a plant at each corner of the square.
Estimating how many plants are needed involves finding the number of rows and columns and determining the spacing between each plant. Measure the landscape bed length and width in inches. Use our feet to inches conversion tool to convert a measurement in feet to inches. Divide the width by the spacing to get the number of columns. Divide the length by the spacing to get the number of rows. Multiply the rows by the columns to find the number of plants needed.
Triangle Planting Grid
Planting flowers in a triangle pattern is a little bit different and involves offsetting each row so that the plants are at an angle to each other. Divide the landscape bed into a series of equilateral triangles with the edges of the triangle the desired spacing. The rows will be offset or shifted by about half of the spacing length and will be closer together since the spacing will be at an angle.
Measure the length and width of the landscape bed in inches. Divide the width by the plant spacing to find the number of columns. Since the plants are at an angle to each other the spacing between the rows will be shorter. Use the formula row spacing = (plant spacing / 2) * √3. To find the number of rows simply divide the length by the row spacing. Next multiply the number of rows by the number of columns to find how many plants are needed.